Dredge-bucket joint.



A. T. FRASER.

DREDGE BUCKET JOINT.

APPLLOATION FILED MAY 23, 1907.

PATENTED FEB. 11, 1908.

vi h wooeo 7 To all whom it may concem:

STATES PATENT OFFICE.

DREDGE-BUCET JOINT.

Be it known that I, ALEXANDER THOMAS FRASER, a citizen of the United States, and resident of Butte, Silverbow county, State of Montana, have invented certain -new and useful Improvements in Dredge-Bucket Joints, of-which the following is a specification.

The present invention relates to improvements in joints for dredge buckets, elevating and conveying apparatus, and similar structures including a series of links connected by hinge joints and has for its particular object to im rove the form of joint illustrated and descri ed in Patent 854,731 dated May 28, 1907.

The invention is illustrated in the accompanying drawing in which,

Figure 1 is an elevation and partial section through a portion of a dredge bucket and supporting chain, embodying the present invention; Fig. 2 is a horizontal sectional view on the line 22 of Fig. 1; Fig. 3 is a detail view.

. an ad'acent link, said lugs 3, 4, being connecte by bolts or pivot pins 5.

As is well understood means must be provided for preventing the pin 5 from turning relative to the lugs 4 because if such turning is permitted the lugs would be rapidly worn away by grit, etc, which necessarily finds lodgment in the joints.

According to the present invention the pin 5 is held from turning in the lugs 4 by blocks 6, each having a curved face adapted to partly surround and fit closely against the pin. Said blocks are held in place in the lugs 4 and pressed a ainst the pins 5 by wedges 7.

Each 0 the'blocks 6 is rovided on opposite faces with lugs 8 which enter seats or recesses in opposite sides of the slots in the lugs 4 in which each of said blocks extend and by means of said lugs 8 the blocks and lugs 4 are so connected that movement of the blocks longitudinally of the pins 5 is prevented.

The blocks 6 are so constructed that the projecting ends of the curved surface thereof and the ends of the lugs 8 are all included within a circle having a diameter equal to that of the passage for the pin 5, so that said Specification of Letters Patent. Application and m 23.1907: Serial Ho. 316.828.

' "ALEXANDER THOMAS FRASER, 0F BUTTE, MONT'A NA,

Patented Feb. 11, 1908.

blocks may be readily inserted in the In s and then moved longitudinally of the lin to properly seat said lugs 8 in the sockets provided for them.

It will beu nderstood that the sockets or re cesses for the In s 8 'do not extend through the side faces of t e lugs 4 and that the 0 ening in such side faces of the lugs is mere y of a width sufiicient to accommodate the body of the block 6.

After the pins 5 have been inserted the wed es 7 are driven between the ends of the bloc and the body of the lug, thus locking the pins firmly to the lugs.

By referrin to Fig. 2 it will be seen that while the we ges 7 extend entirely through the lugs 4 the are so arran ed as to be out of contact wit the lug 3 of t e adjacent link and can be readily driven from engaging position when desired.

By employing a locking means of the character illustrated and above described, the lugs 4 are not weakened and the struc ture resents some practical advantages over t e form of lock shown in the application hereinbefore referred to.

Havin described my invention what I claim an desire to secure by Letters Patent 1s:

1. In a chain of the character described, the combination with links having lugs, and pivot pins connecting lugs of adjacent links, of means for locking the pins to certain of said lugs comprising blocks seated in said lugs and bearing on the pins, and wed es extending substantially paralleLWith sai pivot pins and bearing on said blocks.

2. In a chain of the character described,

the combination with links having lugs, and.

pivot pins connecting lugs of adjacent links, of means for locking the pins to certain of said lugs com rising blocks seated in said,

pair of separated lugs at one end adapts to receive between them a member of an adjacent link, and pivot ins each extendi through the separated ugs of one link an the intermediate member of another link, of

means for locking the pins to said separated lugs, comprising a block seated in each of said lugs and bearing on the pivot pins, and wedges extending throu h said lugs in the direction of the length 0 the pivot pin and holding said blocks a ainst the pivot pin.

7 4. In a chain of t e character described, the combination with links each havin a pair of separated lugs at one end adapte to receive between them a member of an adjacent link, and pivot pins each extendi through the separated lugs of one link an the intermediate member of another link, of means for locking the pins to said separated lugs, comprising a block seated in each of said lugs and bearing on the pivot pins, and wedges extending through said lugs in the direction of the length of the pivot pin and in rear of the member of the other link and holding said blocks a ainst the pivot pin.

5. In a chain of t e character described, the combination with links having lugs, and pivot pins connecting lugs of adjacent links, of blocks fitted in seats formed in the lugs of one link and bearing against the pivot pin extending into said lugs, means en agin 1 said block to revent movement tIaerco longitudinally o the pivot pin, and wedges extending through the lugs in which the blocks are mounted andholding the blocks against the pivot pin.

6. The combination of a chain link having at one end a pair of separated lugs, a second hnk having a lug extending between the lugs on the first said link, a pivot pin extending through passages in the said lugs of both links, blocks fitted in seats in thelugs of the first saidlink and bearing on the pivot pin, and

- wedges extendin longitudinally ofthepivot pin through the ugs of'the first said link at one side of the intermediate lug of the second said link and'eng ing said blocks.

In testimony w ereof I affix my signature in presence of two witnesses.

ALEXANDER THOMAS FRASER. Witnesses:

CARL J. SMITH, F. H. PILLING. 

